This holds despite the apparent loss of scale invariance discussed above (but scale invariance of the DML does underlie this relation).
Ref. [1]} showed this for the first time for spherical systems. Reference [2]} showed that it holds for arbitrary self-gravitating DML systems in the `aquadratic Lagrangian' theory of Ref. [3]}, and Ref. [4]} showed it to be a general result of modified-gravity DML.
